My comments:

1. Your central idea does not match the main points in the body of your speech.
2. Introduction? Attention-getter?


Topic: Junk food's So Tasty, But Where Is It Leading Me?

General Purpose: To inform

Specific Purpose: To inform my audience about the effects of junk food on health.

Central Idea: The effects of junk food are obesity, heart diseases and lack of energy.


Introduction:

A. Attention getter
· Give a situation
§ Eating junk food
§ Still hungry and want more food.
§ Ordering for fast food delivery.
B. Background information of the topic
· What is the exact definition of junk food?
§ Eating junk food or fast food is like knowingly consuming poison, a slow-acting vitriol that eats away at your health and well-being.
§ Michael Jacobson director of the Center for Science in the Public Interest defined the phrase junk food in 1972 as slang for foods of useless or no nutritional value.
§ Resisting junk food is so difficult because of the taste and it makes you want to take a bite of it but with age, taking in junk food is something to be desisted as they do not have a healthy effect on the body.

C. Preview of the speech (central idea)
  • The effects of junk food are obesity, heart disease and lack of energy.
( transition: Does fast food or junk food cause obesity? If we take a look at this slide, I think you already got the answers, right? .)

http://www.dietpolicy.com/diets-articles/junk-food-facts.htm

Main points 1: Obesity

· Does fast food or junk food cause obesity?
§ Fast food does causes obesity by increasing the amount of calories consumed.
§ Fast food contains high amount of saturated fats, calories and these foods have lead to an alarming rise in the obesity rates.
§ Many studies have also proved that fast food causes obesity.

(Internal preview: Now, I will focus on the causes of fast food obesity.)


  • · C Causes of fast food obesity.

§ Fast food contains high saturated fats and calories.
§ Fast foods are packed with high amount of sugars, carbohydrates, oil etc. Even small amount of fast food can increase your calorie intake considerably.
§ Fast foods are available in large portion sizes, which again encourage you to overeat.
§ While consuming fast foods, we may get tempted to have extra cheese and soft drink too.


  • · A According to a research, if you consume fast food 2 times a week, your obesity risk increases by 50%.

§ Taking steps such as cooking healthy meals at home, exercising daily can prevent obesity.
§ Fast foods, combined with sedentary habits, lack of exercise are important factors causing obesity.
http://fitness.ygoy.com/2008/11/27/how-does-fast-food-cause-obesity/

(Transition: Let’s change direction for a moment , through years of keeping the same eating habits including fast food dining, junk food etc., the cholesterol plaque will cause thickening of the artery walls and narrowing of the arteries, a process called arteriosclerosis.)




Main points 2: Heart diseases.


· Tde cholesterol plaque will cause thickening of the artery walls and narrowing of the arteries, a process called arteriosclerosis.
§ When coronary arteries are narrowed, they are incapable of supplying enough blood and oxygen to the heart muscle during exertion.
§ Lack of oxygen to the heart muscle causes chest pain.
§ The formation of a blood clot in the artery can cause a complete blockage of the artery and lead to the death of the heart muscle (heart attack).

· Trans fats are found in many fast foods.
§ These processed fats are made from liquid oil or hydrogenated vegetable oil to make a stiffer fat.
§ Saturated fats will raise total cholesterol levels, but trans fats will raise low-density lipoproteins (LDL) that is the the bad type of cholesterol and lower high density lipoproteins (HDL) that is the good type of cholesterol.
§ Higher levels of LDL have been directly linked to the incidence of coronary artery disease, according to Mary Beth Sodus, a registered dietitian at the University of Maryland Medical Center.
http://www.livestrong.com/article/26855-fast-cause-heart-disease/
(Transition: Finally, junk food doesn't contain the nutrients your body needs to stay healthy or beneficial to the human body.)

Main points 3:Lack of energy.


· These foods are filled with harmful carbohydrates, fats and cholesterol that do not provide any useful energy.
§ You consume junk food which will reduced level of essential nutrients thereby causing weakness in the body.
§ Short-term adverse effect resulting from eating junk foods.
§ You may feel chronically fatigued and lack the energy you need to complete daily tasks.
§ The high levels of sugar in junk food puts your metabolism under stress when you eat refined sugar, your pancreas secretes high amounts of insulin to prevent a dangerous spike in blood sugar levels.
§ Blood sugar levels will drop suddenly after eating, leaving you feeling grumpy, fatigued and craving sugar.

(Transition: So what have we looked at so far? Well, our body uses food and liquid as fuel.)


Conclusion:

(Internal summaries: In going back over the effects of eating junk food is like putting a bad fuel into our body.)

A. Summary of main points

· Eating a lot often of junk food is going to cause problems.

§ The body has to work extra hard and this causes a lot of bad things.

§ This causes a lot of bad effects such as obesity, heart disease and also lack of energy.


B. Memorable final statement/Call for action

· To be healthy and lose weight you have to change your lifestyle.

§ Not impossible to change habits and start living a healthier life.

§ The most important factor about it is all knowledge.

§ Never to late to change your lifestyle. If you have the desire and motivation then nothing will stop you.

§ Today could be the first day of the rest of your life. Make changes today not tomorrow. You will be surprised what you can actually accomplish.